Tension-regulator for paper-drying and other similar machines



(Modem V V B N- Tension Rbgniatqr fbr Paper Drying and other:

Similar Machines.

Patented Jan. 25,1881.-

INVBNTOR: Y

'WITNE SS FiSJi ATTORNEYS.

NJETERS, FIIOTQ-LITHOGRAPHER. WASHINGTON. D. C.

UNITED STATES,

PATENT OFFICE.

R'OBEBT'HUTTON, OF HOLYOKE, MASSACHUSETTS.

TENSION-REGULATOR FOR PAPER-DRYING AND OTHER SIMILAR MACHINES.

SPECIFICATION forming part of Letters Patent No. 237,021, dated January 25, 1881.

Application filed September 25, i880. (Model) To all whom it may concern:

Be it known that I, ROBERT HUTTON, of Holyoke, Hampden county, State of Massachusetts, have invented anew and useful Improvement in Tension-Regulators for Paper- Drying and other Similar Machines, of which the following is a specification.

The object of my invention is to automaticallyregulate the tension of material being wound upon or unwound from rolls-as, for instance, in paper-drying machines, printing-presses, wall-paper-printin g machines, calico-calendering machines, cloth-stretching machines, and wherever an' adjustable tension is required. Such a regulator is especially required in paper-making machines, as it is difficult to keep the tension of the paper uniform as it passes from the drying-cylinder to the calenderingrolls, on account of the expansion and contraction, which either tears the paper by undue strain or causes wrinkling by insufficient tension.

My invention "consists in a loose drivingpulley having its hub formed with inclines, and loose collars formed with inclined faces, that are drawn to the hub by springs, combined with a winding-shaft having fixed collars, which are pressed to the loose collars by a screw, whereby the shaft is turned by the pulley, the friction being increased or diminisbed by the equalization of the strain between the springs and' the material being wound.

1n the accompanying drawings, Figure l is a side elevation of the tension-regulator as applied to a shaft, with the pulley broken open. Fig. 2 is a cross-section on line :0 w of Fig. 1. Fig. 3 is adetail section, showing the adjusting screw applied to the end of the shaft; and Fig. 4 shows the adjusting devices in modified form.

Similar letters of reference indicate corresponding parts.

A is a shaft, which may be the windingshaft carrying the calendering-rolls of a papermachine.

B is a pulley loose on shaft A, which is preferably of a comparatively small diameter, and is formed with hubs a a, having double inclines on their ends.

0 C are collars or disks, fitted loosely on shaft A at opposite sides of pulley B, and having their faces next to hubs a formed with inclines corresponding to the inclines of the hubs.

D D are collars secured on shaft A next to the loose collars 0, there being a disk, b, of leather, rubber, or other suitable material between each collar D and adjacent collar 0. One collar, D, is secured to the shaft by a setscrew or similar device, while the other is held by a cross-key, c, that passes through a crossslot in the shaft and fits in a groove formed in the collar. The slot for key 0 is elongated to allow adjustment lengthwise of the shaft, and in the end of the shaft a screw, 01, is tapped, the end of which bears on key 0, so that by turning the screw the key and collar are set up and the pulley and loose collars clamped between the two fixed collars D.

The hub a. at each side of pulley B is connected to the adjacent loose collar 0 by a spring, 6. These springs tend to draw the collars G to the pulley, and the inclines at one and the springs reversed to the inclines, the tendency of the springs is to jam the loose collars between the hubs a and fixed collars D.

The collars D are to be set so that the shoulders on hub a, formed by the double inclines, are separated from the shoulders 0n collars (3. Between these shoulders there are blocks f of rubber.

The screw 01 is to be set up to give the desired pressure on the washers b, so that the shaft shall be turned by friction between the fast and loose collars.

In operation, pulley B being driven in the direction tending to separate the inclines, the tension of the material being wound tends to hold back the loose collars 0 against the action of springs e. If the tension of the material becomes greater, the springs a yield, there by loosening the pressure on the washers; or, if the tension lessens, the springs will draw the collars G in a direction to increase the pressure on washers b. There is thus more or less slip continually taking place between pulley B and shaft A, according to the tension of the paper. When empty the calendering or winding rolls will run at the same speed as the pulley.

side being reversed to those at the other sides 011 along winding-shaft, in place of screw 61, I use the devices shown in Fig. 4. h is a screwsleeve secured to shaft A, and carrying a screw-collar and hand-wheel, i, which bears on collar D. By turning the hand-wheel the collar is set up.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- The tensionmegulator consisting of drivingscribed.

ROBERT BUTTON. Witnesses:

(L C. JENKS, GEORGE PERKINS. 

